Type-writer.



J. B. MARTIN. TYPE WRITER. APPLIOATION'I'ILED AUG. 1, 1910.

Patented Nov. 1,1910.

2 sums-sum 1'.

I Zil, Inventor Attorneys J. B. MARTIN.

TYPE WRITER.

APPLICATION FILED AUG. 1, 1910.

9'74, 1 64:. Patented Nov. 1, 1910.

2 SHEETS-SHEET 2.

Witnesses nventor J ZJl/%WZ/Z by: I a

Attorneys citizen of the United States, residing. at

. To all whom it may concern: g

- UNITED STATES PATENT OFFIC aonn'nnrrrsrl MARTIN, or HAHNvILLn; LOUISIANA.

TYPE-WRITER.

, Beit' known that .'I, ;J'o1=.tn Em a Hahnville,' in the parish of St. Charles and .State of Louisiana, have invented a new and useful Type-Writer, of which the following'is a specification. I t y This 111V6I1t1011 has reference'to improve- I. ments in typewriters audits object is to pro-- vide a-- means whereby the carriage of the typewriter will be automatically returned to initial position at the completion of' a line and the-platen will be moved axially a suitable-distance for line spacing.

In accordance with the present invention there is provided an electric motor which at a proper time is energized by a'suitable current source and causes the-movement of the carriage in a direction opposed to the ordinary carriage spring, and there is rovided mechanisin whereby at the-end othe 're turn movement of the carriage the platen is given a partial turn. Provision is also made whereb the current to the motor is cut off when t e carriage arrives at its initial .position and the circuit is not again completed until the line has been written. By this means the operator has not topay any attention to either-returning the carriage or moving the platen for line spacing but can give entire attention to the writing, thus economizing time.

' vention 'as applie .to a typewriter,.the show I The invention will best understood from a considerationo'fthe following detailed description taken in connection with the accompanying drawin s forming a part of 'thi s'specification, in w ichdrawings'z- .Figure 1 is a erspective view of the in= ingbeing in part diagrammatic. Fig. 2 is an end view ofthe carriage carried mechanism for turning" the platen. Fig." 3 is a plan view of the structure of Fig. 2.] Fig. 4 is a detail view showing a means for preventingshock as the mechanism is energized for the return of ,the carriage to. its initial position.

Referring to the drawings there is shown a frame lwhich may-be taken as typical of any of the ordinary styles of typewriters, the present invention being adaptable with slight changes to any ofthe standard makes I Specification of Letters Patent. Application filed August 1, 1910. S eria1I\To.57%}?87.

'- Patented Nov. 1; 1910.

of ypewriters without material "change in the structure of either the typewriting maehine or the present-invention.

The frame of the typewriter shown is' that of the Underwood typewriter, but it will be understood that this showing is only indicative and that the invention is by no means confined to the particular make of typewriters mentioned. There is also shown in Fig. l a carriage 2 with the platen o mounted therein. These structures are also to be taken assimply indicative since the showing would vary with different types of machine. In the drawings the mounting of the carriage and other parts which do not enter intothe present invention have 5 is formed into a bearinglO traversed by a metallic rod 11 held in place by a thumb or set screw 12 carried by the bearing 101 The rod 11 is further carried by another bearing 13 serving to guide the rod and this rod is also provided with a series of spaced perforations 14 for the reception 'of pins 15 and 16 for a purpose which will presently appear. On the carriage is a stop member 17 participating in the movements of the carriage and this stop member 17 is designed to engage the pins 15 and 16in a manner and for a pur se which will presently appear. The rods and 11 are in alinement one with theother and the rod '7 is customarily fixed a inst movement but may be adjusted'lon- .gitudinally atwill. The rod 11 is capable of longitudinal movement under conditions to be described and may be brought into engagement with the rod 'Zor may be moved out of engagement therewith. I

At a convenient point there is located a small electric motor 18' which may receive I current from abattery 19 or other source of current which battery l5 connected on one the rod 7 there is established an side aco'nductor 20 to-oiie ffsidei of the motor and 0111113? other si 21 to the post 'or standard 5.. Th of the motor 18'isfconri q 22 to'the rod 7- a t-the endrod 11. The arrangfment the rod 11 is br'oug tinto e bon ductor 21 cuit from the battery 19 to the post the latter to the rod 7 returning 'by way of the-conductor 22 to them'otor '18' and from the latter bythe conductor 20.to the battery 19. -Whenever the IOd'jll is brought into engagement with the rod .7thisc1rcuit is comp eted and the motor isenergized. 'The armature shaft of the motor carries a winding drum'23 connected by a cord or strand 24 to the carriage 2 and the arrangement is such that when the motor is-energized the strand'24 is wound on the drum'23 and the carriage 2 is moved in the appropriate as is customary in typewriting machines when it is desired to return the carriage'to' the initial position after a line or part of a line has been written. i

Since the inertia or the 'carriage'-'ofiers large resistance to the motor iii-starting the strand 24 has connected in it at, an a pro-' priate point an elastic section 25,best s own in Fig. 4, so that there is a certain amount of slack in the strand 24 and-when the mo: tor is started this slack will be taken up be fore the strand 24 will act on the carriage '2 thus relieving the motor 18ffrom the. work or starting the carriage at'on'ce, the actual time interval in practice 'isyery small; At one end of the shaft of the platen 3 is the usual ratchet wheel 26 under the control of a slidingpawl27 carried by the correspondin portionof the carriage 2, this awl or slide eing under the normal control of a spring 28.

Mou'ntcdon the carriage 2 is a lever.;29 viavingone end provided with an angle extension 30 adapted to enga e the corresponding end of the slide 27. T is lever 29 is under the normal control of a sprin 31 and the end remote from the angle on 30 is so positioned as to engage the post 4 under conditions to be descrlbed.

Letit be assumed that the pins 15 "and 16 have been placed in appropriate holes 14 in the rod 11 so that thepin 16 when the carrings 2 is in' its initial position will be engaged, by the sto member 17 on the curria ewith the a jacent ends of the rods 7 an 11 separated. The operator actuates the typewriter in the usual manner and the carriage 2 is fed toward the left as usual, the strand 24 unwinding from the drum 23, the armature of the motor yielding readily delay aponductor dit. rection, which direction is toward the right .the lever 29 to the post 4 may although since the metal is not energized. The move:- ,ment of thecarriage tin'ues-as the typewriter :ultimatelythe stopimember 17 its-brought 2 toward the left eonis operated until carriage until ultimately the rod 11 is brought into contact with the rod 7 and the electric circuit already described .is lished through the motor 18 thus energizing the latter and causing it to operate. This results in the carriage 2 beingrapidly drawn to the initial position at which point the sto member 17 contacts withthe pin 16 into .contact'witht pin 15 when thelrodllparticipates in the further movement of the estab- I an the rod 11 is moved out of electrical en 'gagement with the rod 7 and the circuit is ruptured, the-motor stopping. Just prior however to the carriage 2 rea'chin the ini-' tial position under the action of t e motor 18, t e lever 29 is brought into engagement with the post 4 and so moved thereby as to cause the end 30 to enga e the pawl 27 in a manner to move the atter against the spring 28 and turn the platen?) the required distance for a line space. The relation of be such that the lever will ultimately snap'by the post and when the'carriage 2 is again actuated in the forward direction the lever 29 will again move the post 4 in the opposite direction .butidly so faras its action on the driving 27 is concerned.= The line spacing pawl will be modified for other typesof malever chine, but generally the form shown will answer. The automatic return of the carriage will occur each time are brought together and this maybe readily determined by the relative positions of the pins 15 and 16 to each. other and to the stop member 17. If it be desired to determine the position of the lines upon the paper, the rod 7 may be adjusted in the post 4 and cramped by the thumb screw 9 in the new h of the line is readily osition and the len etermined by thedistance-between the pins 15 and 16.

What is claimed is v 1. In a typewriter, an'electriomotor for returning the typewriter carriage tothe initial osition, and two contact members includa le in circuit with the motor, one contact member being. adjustable to and from the other, and the other contact member being movableby the'carriage into and out of engagement with the first named contact and provided with adjustable means for determining-the time of actuation. of said movable contact by the carriage.

2; In a typewriter,.an returning the typewriter carriage to the initial position, and two contact rods includable in circuit with the motor, ing in ahnement one with the other and one electric motoi" forv said rods bethe rods 7 and 11 of said rods being Provided with auseries of In testimony that I claim the feregeing; spaced perforations wlt-h removable plus as my own, I have hereto afitxed my slgnnadapted thereto, and an actuating member ture in the presence of two wltnesses.

on the carriage of the typewriter adapted to JQHN BAPTIST MARTIN.

engage either of the pins to move the rod Witnesses: into or out of engagement with'the other LEAV G. VJAL, rod. DANA A. MARTIN. 

